Hiltenburg, Castle ruin in Bad Ditzenbach, Germany.

The Hiltenburg is the ruin of a high medieval hilltop castle on the 716.5 m Schlossberg above Bad Ditzenbach in the Filstal valley. Only wall remains survive; the site also holds a barbecue area with a lawn and a newly built viewing platform looking over Bad Ditzenbach and the neighbouring villages.

The Hiltenburg was first mentioned in 1289 as the seat of a bailiff of the Counts of Helfenstein. From 1356 the older Helfenstein line used it as a secondary residence, and in 1396 it became their main residence. It was pledged to Württemberg from 1446 to 1482. On 9 November 1516 Duke Ulrich of Württemberg ordered its destruction, and it was not rebuilt for cost reasons; the Helfensteins moved their residence to Wiesensteig.

The name Hiltenburg probably comes from the Helfenstein family, who held the castle from 1289 and made it their main residence in 1396. After Duke Ulrich of Württemberg had it destroyed in 1516, the Helfensteins moved their seat to Wiesensteig. Visitors today see the secured wall remains and the viewing platform built during the 1976–1979 restoration.

The ruin sits on the 716.5 m Schlossberg above Bad Ditzenbach in the Upper Filstal. The site has a barbecue area with a sunbathing lawn and a viewing platform looking over the village and neighbouring settlements. The wall remains were secured between 1976 and 1979, and later restoration work included archaeological excavations by the Göppingen county archaeology office.

The castle was destroyed on 9 November 1516 by order of Duke Ulrich of Württemberg and never rebuilt for reasons of cost; the Helfenstein counts then moved their residence to Wiesensteig. The wall remains were secured between 1976 and 1979 by the Stuttgart forestry directorate and the state forestry office of Weilheim/Teck, and later restorations were accompanied by excavations of the Göppingen district archaeology unit.